The circulation of water induced by winds in an enclosed ocean comparable in size to the North Pacific is treated by using the "mass transport" instead of current velocity and by taking both horizontal and vertical mixing into account. The numerical solutions have been worked out for the wind system similar to that actually prevailing over the North Pacific, and for different intensities of lateral mixing. It is concluded that the flow pattern best agrees with the actual circulation when the numerical value of the coefficient of lateral mixing is of an order of magnitude of 109 c.g.s. Westward intensification of current is noticed too.